Missouri Key is a small island in the lower

Florida Keys The Florida Keys are a coral island, coral cay archipelago off the southern coast of Florida, forming the southernmost part of the continental United States. They begin at the southeastern coast of the Florida peninsula, about south of Miami a ...

. U.S. 1 (or the

Overseas Highway The Overseas Highway is a highway carrying U.S. Route 1 (US 1) through the Florida Keys to Key West. Large parts of it were built on the former right-of-way of the Overseas Railroad, the Key West Extension of the Florida East Coast Ra ...

) crosses the key at approximately mile marker 39.5, between

Ohio Key U.S. Route 1 in Florida, US 1 (or the Overseas Highway) crosses the Ohio Key at approximately mile marker 39, between Missouri Key and Bahia Honda Key. Today it is also known as Sunshine Key, after a camping resort located there. The portion of t ...

and

Little Duck Key Little Duck Key is a small island in the lower Florida Keys. Coordinates U.S. 1 (or the Overseas Highway) crosses the key at approximately mile marker 40, just west of the Seven Mile Bridge. The west end of the bridge terminates on this islan ...

. The island was named during

Henry Flagler Henry Morrison Flagler (January 2, 1830 – May 20, 1913) was an American industrialist and a founder of Standard Oil, which was first based in Ohio. He was also a key figure in the development of the Atlantic coast of Florida and founder ...

Overseas Railroad The Overseas Railroad (also known as Florida Overseas Railroad, the Overseas Extension, and Flagler's Folly) was an extension of the Florida East Coast Railway to Key West, a city located beyond the end of the Florida peninsula. Work on the line ...

construction years by workers from that state. It is sometimes known locally as Little Grassy Key or Grassy Island.

References

Uninhabited islands of Monroe County, Florida Islands of the Florida Keys Islands of Florida {{monroeCountyFL-geo-stub